72397000171 has 2 divisors, whose sum is σ = 72397000172. Its totient is φ = 72397000170.

The previous prime is 72397000163. The next prime is 72397000183. The reversal of 72397000171 is 17100079327.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72397000171 - 2³ = 72397000163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72397000171.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36198500085 + 36198500086.

It is an arithmetic number, because the mean of its divisors is an integer number (36198500086).

Almost surely, 2^72397000171 is an apocalyptic number.

72397000171 is a deficient number, since it is larger than the sum of its proper divisors (1).

72397000171 is an equidigital number, since it uses as much as digits as its factorization.

72397000171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18522, while the sum is 37.

Adding to 72397000171 its reverse (17100079327), we get a palindrome (89497079498).

The spelling of 72397000171 in words is "seventy-two billion, three hundred ninety-seven million, one hundred seventy-one", and thus it is an aban number.